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Why strings in $_POST can not contain a dot ".”?

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By User



Basicaly the title say's it all. i had an hidden input on my page where i wanted to set the name to "some.major.uber.setting"





for example: <input type="hidden" name="some.major.uber.setting" value="dummy value" />





and when i looked at the $_POST data it contained "some_major_uber_setting". Can anybody explain this behaviour



Source: Tips4all
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  1. Tips For AllApril 6, 2012 at 7:33 AM

    That is probably a relict from register_global = On times. $_GET/$_POST variables were turned into standard variables ($_GET['foo'] became $foo). Variable names can't contain dots so they were internally converted.

    ReplyDelete
  2. Tips For AllApril 6, 2012 at 7:33 AM

    This has been there since the original commit to CVS, more than 10 years ago.

    It has a comment:


    /* ensure that we don't have spaces or dots in the variable name (not binary safe) */


    I have no idea why it isn't "binary safe"... You'd have to ask Zeev.

    ReplyDelete
  3. Tips For AllApril 6, 2012 at 7:33 AM

    Its documented in php.net as:


    Dots and spaces in variable names are converted to underscores.

    ReplyDelete

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